/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.gameserver.network.clientpackets;

import com.l2jserver.Config;
import com.l2jserver.gameserver.TaskPriority;
import com.l2jserver.gameserver.geoeditorcon.GeoEditorListener;
import com.l2jserver.gameserver.model.actor.L2Character;
import com.l2jserver.gameserver.model.actor.instance.L2PcInstance;
import com.l2jserver.gameserver.network.serverpackets.GetOnVehicle;
import com.l2jserver.gameserver.network.serverpackets.ValidateLocation;

/**
 * This class ...
 *
 * @version $Revision: 1.13.4.7 $ $Date: 2005/03/27 15:29:30 $
 */
public class ValidatePosition extends L2GameClientPacket
{
	private static final String _C__59_VALIDATEPOSITION = "[C] 59 ValidatePosition";
	
	/**
	 * urgent messages, execute immediately 
	 * @return
	 */
	public TaskPriority getPriority()
	{
		return TaskPriority.PR_HIGH;
	}
	
	private int _x;
	private int _y;
	private int _z;
	private int _heading;
	private int _data; // vehicle id
	
	@Override
	protected void readImpl()
	{
		_x  = readD();
		_y  = readD();
		_z  = readD();
		_heading  = readD();
		_data  = readD();
	}
	
	@Override
	protected void runImpl()
	{
		final L2PcInstance activeChar = getClient().getActiveChar();
		if (activeChar == null
				|| activeChar.isTeleporting()
				|| activeChar.inObserverMode())
			return;
		
		final int realX = activeChar.getX();
		final int realY = activeChar.getY();
		int realZ = activeChar.getZ();
		
		if (Config.DEVELOPER)
		{
			_log.fine("client pos: "+ _x + " "+ _y + " "+ _z +" head "+ _heading);
			_log.fine("server pos: "+ realX + " "+realY+ " "+realZ +" head "+activeChar.getHeading());
		}
		
		if (_x == 0 && _y == 0)
		{
			if (realX != 0) // in this case this seems like a client error
				return;
		}
		
		int dx, dy, dz;
		double diffSq;
		
		if (activeChar.isInBoat())
		{
			if (Config.COORD_SYNCHRONIZE == 2)
			{
				dx = _x - activeChar.getInVehiclePosition().getX();
				dy = _y - activeChar.getInVehiclePosition().getY();
				//dz = _z - activeChar.getInVehiclePosition().getZ();
				diffSq = (dx*dx + dy*dy);
				if (diffSq > 250000)
					sendPacket(new GetOnVehicle(activeChar.getObjectId(), _data, activeChar.getInVehiclePosition()));
			}
			return;
		}
		if (activeChar.isInAirShip())
		{
			/*if (Config.COORD_SYNCHRONIZE == 2)
			{
				dx = _x - activeChar.getInVehiclePosition().getX();
				dy = _y - activeChar.getInVehiclePosition().getY();
				dz = _z - activeChar.getInVehiclePosition().getZ();
				diffSq = (dx*dx + dy*dy);
				if (diffSq > 250000)
					sendPacket(new GetOnVehicle(activeChar.getObjectId(), _data, activeChar.getInBoatPosition()));
			}*/
			return;
		}
		
		if (activeChar.isFalling(_z))
			return; // disable validations during fall to avoid "jumping"
		
		dx = _x - realX;
		dy = _y - realY;
		dz = _z - realZ;
		diffSq = (dx*dx + dy*dy);
		
		/*L2Party party = activeChar.getParty();
		if(party != null && activeChar.getLastPartyPositionDistance(_x, _y, _z) > 150)
		{
			activeChar.setLastPartyPosition(_x, _y, _z);
			party.broadcastToPartyMembers(activeChar,new PartyMemberPosition(activeChar));
		}*/
		
		if (Config.ACCEPT_GEOEDITOR_CONN)
			if (GeoEditorListener.getInstance().getThread() != null
					&& GeoEditorListener.getInstance().getThread().isWorking()
					&& GeoEditorListener.getInstance().getThread().isSend(activeChar))
				GeoEditorListener.getInstance().getThread().sendGmPosition(_x,_y,(short)_z);
		
		if (activeChar.isFlying() || activeChar.isInsideZone(L2Character.ZONE_WATER))
		{
			activeChar.setXYZ(realX, realY, _z);
			if (diffSq > 90000) // validate packet, may also cause z bounce if close to land
				activeChar.sendPacket(new ValidateLocation(activeChar));
		}
		else if (diffSq < 360000) // if too large, messes observation
		{
			if (Config.COORD_SYNCHRONIZE == -1) // Only Z coordinate synched to server,
				// mainly used when no geodata but can be used also with geodata
			{
				activeChar.setXYZ(realX,realY,_z);
				return;
			}
			if (Config.COORD_SYNCHRONIZE == 1) // Trusting also client x,y coordinates (should not be used with geodata)
			{
				if (!activeChar.isMoving()
						|| !activeChar.validateMovementHeading(_heading)) // Heading changed on client = possible obstacle
				{
					// character is not moving, take coordinates from client
					if (diffSq < 2500) // 50*50 - attack won't work fluently if even small differences are corrected
						activeChar.setXYZ(realX, realY, _z);
					else
						activeChar.setXYZ(_x, _y, _z);
				}
				else
					activeChar.setXYZ(realX, realY, _z);
				
				activeChar.setHeading(_heading);
				return;
			}
			// Sync 2 (or other),
			// intended for geodata. Sends a validation packet to client
			// when too far from server calculated true coordinate.
			// Due to geodata/zone errors, some Z axis checks are made. (maybe a temporary solution)
			// Important: this code part must work together with L2Character.updatePosition
			if (Config.GEODATA > 0 && (diffSq > 250000 || Math.abs(dz) > 200))
			{
				//if ((_z - activeChar.getClientZ()) < 200 && Math.abs(activeChar.getLastServerPosition().getZ()-realZ) > 70)
				
				if (Math.abs(dz) > 200
						&& Math.abs(dz) < 1500
						&& Math.abs(_z - activeChar.getClientZ()) < 800 )
				{
					activeChar.setXYZ(realX, realY, _z);
					realZ = _z;
				}
				else
				{
					if (Config.DEVELOPER)
						_log.info(activeChar.getName() + ": Synchronizing position Server --> Client");
					
					activeChar.sendPacket(new ValidateLocation(activeChar));
				}
			}
		}
		
		activeChar.setClientX(_x);
		activeChar.setClientY(_y);
		activeChar.setClientZ(_z);
		activeChar.setClientHeading(_heading); // No real need to validate heading.
		activeChar.setLastServerPosition(realX, realY, realZ);
	}
	
	@Override
	public String getType()
	{
		return _C__59_VALIDATEPOSITION;
	}
}
